Nicotine replacement therapy (NRT) v placebo or no treatment (control) for smoking cessation at 6–12 months*
| Comparison | Number of trials (n) | Weighted event rates | RBI (95% CI) | NNT (CI) |
|---|---|---|---|---|
| *Abbreviations defined in glossary; weighted event rates, RBI, NNT, and CI calculated from data in article using a fixed effects model. | ||||
| Any NRT v control | 103 (38 602) | 16% v 10% | 58% (50 to 67) | 17 (15 to 17) |
| Gum v control | 52 (17 819) | 18% v 12% | 48% (38 to 59) | 17 (15 to 20) |
| Patch v control | 37 (16 228) | 14% v 8.1% | 71% (55 to 88) | 17 (15 to 20) |
| Intranasal spray v control | 4 (887) | 24% v 12% | 102% (49 to 173) | 9 (6 to 15) |
| Inhaler v control | 4 (976) | 17% v 9.1% | 90% (36 to 167) | 13 (9 to 25) |
| Tablet v control | 4 (2739) | 16% v 9% | 87% (52 to 223) | 13 (10 to 20) |
